3. Module Interface
3.1. PIN Definitions
PIN
PIN NAME
DESCRIPTION
TYPE
NOTE
Pin1
UART0_TX
UART0 send data
O
UART0
Only used for UART
DCDC works when EN >
1.5V
Pin2
UART0_RX
UART0 receive data
I
Pin3
EN
Enable DCDC
I
Pin4
GND
GND
POWER
Pin5
VDD
Power input
POWER
1.
The TX and RX of UART0 are used for communication with external processor. Please
refer to Chapter 2.3 DC Characteristics for more information of output power level for
UART.
2.
The module has built-in RC reset and watchdog circuit.
3.2. PCB Antenna
The module supports PCB antenna. Within the range of 2.4-2.5GHz, the antenna output S11 is
less than -10dB and gain of antenna is about 2dBi.
